Concrete-mixer.



M. J. DEMOREST.

Patented Oct. 5, 1909.

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' UNITED- STATES PATENT @FFICE MILON J. DEMOREST, OF BELDING,IvIICI-IIGAN, ASSIGNOR TO BALLOU MANUFACTUR- ING COMPANY, OF BELDING,IvIICI-IIGAN.

CONCRETE-MIXER.

To all whom it may concern:

Be it known that I, MILON J. DEMOREST, a citizen of the United States,residing at Belding, in the county of Ionia and State of Michigan, haveinvented certain new and useful Improvements in Concrete-Mixers; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to improvements in concrete mixers; and its objectis to provide a device that will properly and automatically apportionthe ingredients; that will intimately and properly mix the same; tosimplify the construction; and to provide the same with various new anduseful features, as hereinafter more fully described and particularlypointed out in the claims, reference being had to the accompanyingdrawings, in which:

Figure 1. is a side elevation of a device embodying my invention withpart of the frame removed; Fig. 2. a plan view of a portion of the same;Fig. 3. a vertical section of the same on the line 3-3 of Figs. 1 and 2;Fig. 4. a detail in vertical section on the line 4 l of Fig. 3; and,Fig. 5. a transverse section of the mixing drum taken on the line 5 5 ofFig. 1.

Like numbers refer to like parts in all of the figures.

1 is the main driving shaft supported and journaled in a suitable frameand rotated by any convenient means; 2 is a truncated conical mixingdrum mounted on said shaft and open at both ends; 3 a hopper to receivethe sand; 4 is a smaller hopper to receive the cement and arrangedopposite one end of the hopper 3; 5 a gate in the side of the sandhopper to regulate the discharge of sand therefrom; 6 a similar gate inthe side of the cement hopper for a like purpose, and 7 is another gatein the cement hopper that permits the cement to escape laterally fromthe hopper 4E; 8 is a broad endless belt or apron extending horizontallybeneath the openings in the bottom of the hoppers and close thereto, andthis belt engages a roll 18 on the driving shaft 1 at one side of thehoppers and a roll 19 mounted on a countershaft 20, at the other side ofthehoppers. The upper part of this belt extends horizontally close toSpecification of Letters Patent.

Application filed. June 19, 1905.

Patented Oct. 5, 1909.

Serial No. 266,016.

the open lower ends of the hoppers, forms a horizontally moving bottomto the same, and is supported close to the hopper by means of horizontaltables 21, which tables extend beneath the outer edges of the belt onlyleaving the middle portion of the belt unsupported except as by thetension of the same, whereby any hard lumps of sand or stones willspring the belt downward and pass under the gate 5 without injury to themachine.

A chute 9 is provided beneath the roll 18 into which the cement and sandis discharged from the belt and conveyed by this chute into the adjacentend of the mixing drum 2. To preventthe material from clogging in thischute, and to assist in mixing said material, the chute is arranged tovibrate vertically at the lower end by being pivoted to the frame on ahorizontal axis at its upper end as at 2 1, and supported at its lowerend by means of a bail 23 which rests upon pins 22 projecting from theend of the drum 18. As these pins rotate under the bail, they impart tothe lower end of the chute a vertical vibratory movement which causesthe contents of the chute to slide downward and to become more or lessmixed before escaping into the drum.

14 is a screen of parallel, downwardly inclined rods arranged above thehopper 3 to screen out the stones that are too large to pass throughunder the gate 5. Only a part of these rods are shown in the drawing, itbeing understood that the entire top of the hopper 3 is providedtherewith.

10 represents a water tank or other means for supplying water; 11 is apipe extending downward adjacent to the large end of the mixing drum;provided with a valve 12 and thence extended horizontally within thedrum to discharge ,water from the tank 10 into the drum a suflicientdistance from its lower end to permit of intimately mixing the waterwith the sand and cement before the same leaves the drum.-

I also provide an improved construction of mixing drum consisting of thetruncated tapered shell 2 provided at intervals with surrounding bands15, and this shell is supported and adjusted concentric with the axis ofthe shaft 1 by means of rods 16 bent near the middle to partiallysurround the shaft 1 and having their respective ends extended radiallyfrom the shaft outward through the shell and bands and provided withadjusting nuts 17 on their outer ends, whereby the drum is supported inplace and properly adjusted on the shaft.

In operation the gate 5 is'adjusted to determine the quantity of sandthat will be carried out from the hopper 3 by the movement of the belt,and the gates 6 and 7 are in like manner adjusted to determine the flowof cement from the hopper I. This sand and cement is discharged from thebelt 8 into the chute 9 and from thence into the mixing drum 2, whichbeing downwardly inclined at its lower side will gradually convey thesand and cement toward its larger end. This sand and cement will also bestirred and mixed by the rotation of the drum, and thus intimatelyincorporated be fore reaching that portion of the drum where the wateris discharged from the pipe 13. The sand and cement properly moistenedby the water will finally escape from the large end of the drum inproper condition for use.

It will be noted that the construction is very simple and not likely toget out of order, and that the moving parts are all connected directlyto the single shaft 1 and operated thereby.

Having thus fully described my invention, what I claim and desire tosecure by Letters Patent is:

1. In a concrete mixer, a hopper having a side opening, a verticallyadjustable gate for said opening, a horizontally movable belt forming abottom to the hopper, said belt also being vertically yieldable oppositethe gate and having its margins extended beyond the gate, supports formargins only of the belt, and means for moving the belt.

2. In a concrete mixer, a driving shaft, a countershaft arrangedparallel with the driving shaft and spaced apart therefrom, opposingrolls on said shafts, hoppers above said shafts and at a distance fromthe said rolls and having side openings, adjustable gates to saidopenings, a belt engaging said rolls and forming a bottom to saidhoppers, said belt also being yieldable opposite said gates, a mixingdrum on the driving shaft and a chute beneath the belt and drivingshaft.

3. In a concrete mixer, the combination of a driving shaft, a truncatedconical mixing drum on the shaft, roll on the shaft, a chute beneath theroll and extending into the small end of the drum, acountershaftarranged parallel with the driving shaft and spaced aparttherefrom, a roll on the countershaft, a horizontally movable andvertically yieldable belt engaging the rolls and moved thereby, hoppersabove the belt and having side openings opposite the yielding part ofthe belt, and vertically adjustable gates to said-openings.

at. In a concrete mixer, the combination of a hopper, a mixing drum, achute between the hopper and drum, a hinge supporting one end of thechute upon a horizontal axis, a rigid bail supporting the other end ofthe chute, a rotating disk, and pins mounted in the disk to successivelyengage and support the bail.

5. In a concrete mixer, the combination of a sand hopper, a cementhopper, a belt beneath the hoppers, rolls supporting the belt, pins inthe end of one of the rolls, a chute below said roll, a pivotal supportfor the upper end of the chute, a bail supporting the lower end of thechute, the pins in the roll successively engaging and supporting thebail.

6. In a concrete mixer, a sand hopper, a cement hopper, a driving shaftand a countershaft below the hoppers, rolls on the said shafts, a beltengaging the rolls and extending beneath the hoppers, a mixing drum onthe driving shaft, a chute beneath the driving shaft, a pivotal supportfor the upper end of the chute, a bail supporting the lower end of thechute, and pins in the end of the driving shaft drum and successivelyengaging and supporting the bail.

In testimony whereof I affix my signature in presence of two witnesses.

MILON J. DEIWIOREST.

Witnesses G120. WV. MoULToN, ALBER'I. L. SPENCER.

